Impeoved coffee-pot



H. TI LDEN.

Cofiee Pot.

No. 61,122. Patented Jan. 8, 1867.

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HOWARD TILDEN, OF BOSTON, MASSACHUSETTS. I Letters Patent :No. 61,122,dated January 8, 1867.

IMPROVED corms-Per,

TO ALL WHOM IT MAY CONCERN:

Be it known that I, HowAnD TILDEN, of Boston, in the county of Suficlk,State of Massachusetts, have invented certain new and usefulimprovements in CoiYce'Pots; and I do hereby declare the following to bea full and exact description of the same, reference being bad to thedrawings, which accompany and form of this specification, in which-Figure I represents the pot in perspective, with portions of the frontparts removed so as to show the arrangements of the interior parts.

Figure II, a bisected vertical view, showing that form of the interiorparts. i

The same letters represent corresponding parts in the dili'erentfigures. The parts not in any way connected with my invention I havethought best not to designate in particular.

Letter A represents the base orlower part or the body of thecofi'ee-pot; B the upper part thereof; both these being united in one; Ca cone-shaped cylinder, with its small end covered with the concave capD, in the manner represented. E a strainer surrounding the upper end ofthe cylinder 0, made in shape and arranged-as seen in Fig. II, forreasons hereinafter stated. F a rim or band formed upon the outer edgeof the strainer E g a small tube for letting oil the air from thecylinder C When it is put down into the body of the pot. This tube isprovided with a small opening, H, as seen in Fig. II. 2' a cap fittingclose to the tube 9 and provided with a small opening, j,.,to correspondto the opening 71 In constructing the part B, I contract the lower partof it, as may be seen in Fig. II. The rim F is placed to correspond withthe above inclination of the sides of the base of the part B, as can beseen in Fig. II. This fitting of the two parts above mentioned keeps thestrainer E in proper'position andprevents the ground oofi'co fromfalling into the lower part of the pot A. Thc strainer is made in thehemispherical form, so that the ground coffee may gather around the capD, and thus afford opportunity for the air to pass freely through theopenings in the outer part of the strainer to the lower part oi thc potwhile the cofi'ee is being poured out the spout. The object of thechamber produced beneath the concave cap D is as follows: The strainer,with the attaching parts, the cone C, the pipe g, with its cap turned soas to bring the openings h and j in conjunction, being in position asseen in Figs. I and II, water is poured in until it rises alittle inview at the base of the cap I). Now the cap i is turned so as to closethe opening It; the coffee is put in upon the strainer E, and the potset upon the stove. As the heat increases, the expansion of the air inthe chamber D forces the water down within the cylinder O, andconsequently makes it rise through the strainer, and thus soaks theground coffee before the water comes to boiling heat. This is oneparticular feature of my invention, and considered one of muchimportance. As the heat continues and the water begins to boil, thevapor formed in the cylinder 0 will cause the water to rise still moreabove the strainer E. The desirable properties of the codes will beextracted in one or two minutes, when the pot may be removed, and thevapor below condenses, and all the liquid in the upper part of the potfilters through to the part below, and thus the bitter principle of tho'cofi'ec, so undesirable in coffee for ordinary purposes, is notextractedas when the ground coffee is allowed in the liquid after theprocess of cooking, while the short boiling mentioned above is.suflicient to extract that richness which is much praised by ProfessorLiebig.

The nature of my invention relates to the form and manner of combiningthe strainer E with the other parts, as also the use of the air-chamberD in conjunction with the cylinder 0.

What I claim as my invention, and desire to secure by Letters Patent,is-

, The use of the strainer E in form as shown, when provided with the rimF and the air-chamber D, in conbination with the cylinder 0, the tube g,and the body of'the pot A and B, the whole constructed substantially asdescribed and for the purposes set forth.

anart HOWARD TILDEN. Witn esses DANIEL C. OOLLEY, A. T. WING.

